Pressure adjusting mechanism for impression cylinder

The utility model relates to the technical field of printing machines, and discloses an impression cylinder pressure adjusting mechanism which comprises a rack, a first impression cylinder and a plurality of conveying rollers are rotatably mounted in the rack, a support is fixedly connected to the upper surface of the rack, and movable grooves are symmetrically formed in the support; two movable grooves are formed in the upper surface of the support, movable blocks are slidably installed in the two movable grooves, a second impression cylinder is rotatably installed between the two movable blocks and located over the first impression cylinder, and a first air cylinder is fixedly installed on the upper surface of the support. The second air cylinder can drive the worm to be far away from the worm gear, then the first air cylinder drives the second impression cylinder to vertically move, the pressure is adjusted by changing the distance between the first impression cylinder and the second impression cylinder, m